Broadband Wireless Access Technologies and Applications
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1 Broadband Wireless Access Technologies and Applications Dr. Patrick Perini Emerging Technologies September 6, 2000 International Symposium on Advanced Radio Technologies 1
2 Agenda The Wired Network Wireless Access Technologies Wireless Trials ILEC perspectives Broadband Wireless Applications Summary September 6,
3 The Wired Network Central Office OC-3 Hi-Cap Business POTS/DSL Copper Copper RT DS0 - DS1 DS1 - DS-3 OC-3 USAM Copper < 4kft VDSL Residential Access (the last mile) September 6, 2000 [email protected] 3
4 Wireless Access Technologies Hi-Cap Business 20-40GHz Fixed Terrestrial Wireless Optics OC-3 Hi-Cap Business Satellite 20-40GHz Residential Access Satellite 20-40GHz Central Office DS1-DS3 OC-3 DS0-DS1 Residential Wireless Data&Voice Fixed Wireless Access (FWA) < 5.8GHz Fractional DS1 - DS-3 Home RF Ntwks. TV, PC, POTS Small Business GHz Fixed Terrestrial Wireless Optics Residential Ultra High Speed Access Fixed Wireless Access (FWA) > 10 GHz September 6, 2000 [email protected] 4
5 Wireless Access Technologies Hi-Cap Services - Terrestrial Markets - Large to Medium size businesses Products - OC3 and DS3 Data Services Spectrum 20-40GHz worldwide or Wireless Optics Major Players - Winstar, Teligent, Nextlink, ART Air Fiber, TerraBeam Current Technologies - Point to Point/Multipoint Strengths: Low installation costs, re-usable Weaknesses: LOS, Roof costs, Links too short Future Technologies - Mesh Networks (MP2MP) September 6, 2000 [email protected] 5
6 Wireless Access Technologies Markets - Large to Medium Businesses/Residential Products - Fractional DS3/DS1 Data Services/TV Players - Astrolink, Spaceway, SkyBridge, Teledesic, Hughes & Gilat, DBS: Echostar, DirectTV Current Technologies - LEO, GEO, VSAT, DBS Strengths: Hi-Cap Services - Satellite Large coverage area, Rural coverage, Wide downstream bandwidth, Broadcast services Weaknesses: High Latency in GEOs, Satellite complexity in LEOs, Sat lifetime 7-15 years, CPE costs, Installation September 6, 2000 [email protected] 6
7 Wireless Access Technologies Fixed High Speed Access - Terrestrial Markets - Small Business, SOHO, Residential Products - T1 Data, Fast Internet Access, Telephony, TV Players - Sprint, American Telecasting, CAI Wireless, AT&T, MCI Worldcom, United Online,... Current Technologies - MMDS, Unlicen. (2.4, 5.8 GHz) Strengths: Longer Links, Flexible Architecture, Low Entry Costs - Unlicensed Bands, Fast Deployment for High Speed Internet Access Weaknesses: LOS typically required, External Antenna Installation on home, Frequency Re-Use, Interference Management, Backhaul $ September 6, 2000 [email protected] 7
8 Wireless Access Technologies Fixed Ultra High Speed Access - Terrestrial Markets - Small Business, SOHO, Residential Products - Ultra High Speed Data, Telephony, TV Players - Qwest, Korea Telecom, BT, France Telecom Current Technologies - VDSL (22 Mbps down, 3Mbps up) Strengths: Uses existing Copper, Supports voice/data/video Weaknesses: 4000 ft. reach, Requires OC3/12 backhaul TV, PC, POTS Future Technologies - Fixed Wireless Multipoint to Multipoint September 6, 2000 [email protected] 8
9 Wireless Access Technologies Home RF Networking Markets - Small Business, SOHO, Residential Products - Wireless LAN, Home Gateways, Portables Players - Aironet, WiLAN, Proxim, NEC Current Technologies - 2.4GHz/802.11, 64GHz/IEEE1394 Strengths: Avoids Rewiring homes, Multiple clients, Portability, Access sharing, Flexible reconfiguration of home LAN Weaknesses: High Costs, Lack of security, Not all voice/data/video services supported Future Technologies - Home Gateway/Distribution TV, PC, POTS September 6, 2000 [email protected] 9
10 Wireless Access Trials LMDS Trials - Vladan Jevremovic Boulder Technical Trial (Nov , 1998) 31GHz / B-block, 1.85 mile link Spectralink SP1000, Point to Point, 10MHz / 8T1 Examine: Fade Margin, Cross Polarization Isolation, T1 Loopback BER, XDSL Interoperability, Voice, Data Front Range Customer Trial (10/99-3/00) 31GHz / B-block, 6 mile link, Spectralink SP1000 Held Order - No Fiber, Needed Voice & Data Services 99.98% reliability / 1.75 hours of outage per year No customer complaint logged during trial September 6, 2000 [email protected] 10
11 Wireless Access Trials Optical Trials - Thomas Schwengler Lucent Visit (Oct, 1999) Multibeam (4Tx & 1Rx), 1550nm, 2.5Gbps Low BER (10-12 observed), 100% BER in Fog Long Range Lightpoint Trial (1/00 - present) Long Range Link miles, Walnut CO - Adv. Tech. Multibeam (2Tx & 4Rx), 850nm, OC-3/OC-12, Comm Available Short Range Lightpoint Trial (7/00 - present) Link < 1mile, Low BER (10-12 observed in clear weather) Single Beam, 850 nm, DS-3/OC-3/OC-12, Comm Available Gigabit Ethernet Trial (9/00) September 6, 2000 [email protected] 11
12 Wireless Access Trials Fixed Wireless Internet Access - WBU Adaptive Broadband Technical Trial 5.8GHz Unlicensed UN-II band TDMA TDD Technology, 3-6 sectors per Base Station 17.5 MHz channel per sector = 20 Mbps/Sector Subscriber Unit Outside Home - LOS to Access Point Tested Interference Susceptibility, Spectral Emission, Application tests, Network stability, EMS beta testing Application - High Speed Internet Access (W-DSL) Friendly Customers Trial September 6, 2000 [email protected] 12
13 ILEC Perspectives Broadband Wireless Access Equipment Costs are not driving the business case costs Re-occurring Roof leases, operations costs and CPE Installation costs are the business case cost drivers Self installation, and plug and play hardware is critical Reliability of Wireless Access Technologies < Fiber when considering all weather conditions Optical links and Microwave links are complimentary and can provide high reliability when used together New Access Technologies are expensive to scale into large ILEC provisioning systems September 6,
14 ILEC Perspectives In Region - New Revenues only from data services (No Long Distance revenues, Local Voice not new revenue) Excellent for CLEC out of region play in small markets Will bring fiber further out and closer to the home; Wireless can help with last mile solutions (e.g. DSL reach extension & gap fill strategy) Need wireless access technologies that will support the next generation services (VoIP, VPNs) Need network integration and product interoperability Need technology to mitigate LOS requirements/cost Need residential and SOHO broadband wireless access that looks like DSL service to our customers September 6, 2000 [email protected] 14
15 Broadband Wireless Applications Applications care about layers 3-5 (Not Layer 1) The Killer Applications: Residential - Fast Internet, Voice, Television Business - Data, PBX, VConf, VPNs, ASPs, Web hosting Emerging Technologies: Voice/Video over IP - (MPLS, Diffserv, IPv6) Mobile IP Gigabit Ethernet Passive Optical Network Optical switching September 6, 2000 [email protected] 15
16 Summary Wired access technologies have a wireless equivalent CLECs well suited to implementing Broadband Wireless in areas where competition is weak & service lacking ILECs concerned about scaling and integration DS1-DS3 data is moving toward edges of network Wireless access networks can and will connect to core fiber networks (Mobility and Portability increase access) Application compatibility with Layer 3 and up are critical to successful services September 6, 2000 [email protected] 16
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